diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 0000000..dbbe55a
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,16 @@
+name: "CodeQL"
+
+on: [pull_request]
+jobs:
+  lint:
+    name: CodeQL
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    - name: Run CodeQL
+      run: |
+        docker run --rm -v $PWD:/app composer sh -c \
+        "composer install --profile --ignore-platform-reqs && composer check"
\ No newline at end of file
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..5babce5
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,28 @@
+name: "Tests"
+
+on: [pull_request]
+jobs:
+  lint:
+    name: Tests ${{ matrix.php-versions }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-versions: ['8.1', '8.2', '8.3', 'nightly']
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    - name: Setup PHP ${{ matrix.php-versions }}
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php-versions }}
+
+    - name: Validate composer.json and composer.lock
+      run: composer validate --strict
+    
+    - name: Compose install
+      run: composer install --ignore-platform-reqs
+
+    - name: Run tests
+      run: composer test
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 3ba22f2..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-language: php
-
-php:
-- 8.0
-- nightly
-
-notifications:
-  email:
-  - team@appwrite.io
-
-before_script: composer install --ignore-platform-reqs
-
-script:
-- vendor/bin/phpunit --configuration phpunit.xml < tests/input.txt 
-- vendor/bin/psalm --show-info=true
diff --git a/composer.json b/composer.json
index 49e8f61..12160ff 100755
--- a/composer.json
+++ b/composer.json
@@ -6,9 +6,10 @@
     "license": "MIT",
    
     "scripts": {
-        "test": ".vendor/bin/phpunit --configuration phpunit.xml < tests/input.txt",
-        "lint": "./vendor/bin/pint --test",
-        "format": "./vendor/bin/pint"
+        "test": "vendor/bin/phpunit --configuration phpunit.xml < tests/input.txt",
+        "check": "vendor/bin/phpstan analyse -c phpstan.neon",
+        "lint": "vendor/bin/pint --test",
+        "format": "vendor/bin/pint"
     },
     "autoload": {
         "psr-4": {"Utopia\\CLI\\": "src/CLI"}
@@ -20,7 +21,7 @@
     "require-dev": {
         "phpunit/phpunit": "^9.3",
         "squizlabs/php_codesniffer": "^3.6",
-        "vimeo/psalm": "4.0.1",
+        "phpstan/phpstan": "^1.10",
         "laravel/pint": "1.2.*"
     },
     "minimum-stability": "dev"
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..a76a832
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,5 @@
+parameters:
+    level: 5
+    paths:
+        - src
+        - tests
\ No newline at end of file
diff --git a/src/CLI/Console.php b/src/CLI/Console.php
index 43057bc..e2a47bd 100644
--- a/src/CLI/Console.php
+++ b/src/CLI/Console.php
@@ -23,7 +23,7 @@ public static function title(string $title): bool
      * Log messages to console
      *
      * @param  string  $message
-     * @return bool|int
+     * @return int|false
      */
     public static function log(string $message): int|false
     {
@@ -36,7 +36,7 @@ public static function log(string $message): int|false
      * Log success messages to console
      *
      * @param  string  $message
-     * @return bool|int
+     * @return int|false
      */
     public static function success(string $message): int|false
     {
@@ -49,7 +49,7 @@ public static function success(string $message): int|false
      * Log error messages to console
      *
      * @param  string  $message
-     * @return bool|int
+     * @return int|false
      */
     public static function error(string $message): int|false
     {
@@ -62,7 +62,7 @@ public static function error(string $message): int|false
      * Log informative messages to console
      *
      * @param  string  $message
-     * @return bool|int
+     * @return int|false
      */
     public static function info(string $message): int|false
     {
@@ -75,7 +75,7 @@ public static function info(string $message): int|false
      * Log warning messages to console
      *
      * @param  string  $message
-     * @return bool|int
+     * @return int|false
      */
     public static function warning(string $message): int|false
     {
@@ -111,7 +111,7 @@ public static function confirm(string $question): string
      *
      * Log warning messages to console
      *
-     * @param  string  $message
+     * @param  int  $status
      * @return void
      */
     public static function exit(int $status = 0): void
@@ -126,8 +126,7 @@ public static function exit(int $status = 0): void
      *
      * @param  string  $cmd
      * @param  string  $stdin
-     * @param  string  $stdout
-     * @param  string  $stderr
+     * @param  string  $output
      * @param  int  $timeout
      * @return int
      */
@@ -159,7 +158,7 @@ public static function execute(string $cmd, string $stdin, string &$output, int
             $stdoutContents = \stream_get_contents($pipes[1]) ?: '';
             $stderrContents = \stream_get_contents($pipes[2]) ?: '';
 
-            $outputContents = $stdoutContents ?? '';
+            $outputContents = $stdoutContents;
 
             if (! empty($stderrContents)) {
                 $separator = empty($outputContents) ? '' : "\n";
diff --git a/tests/CLI/TaskTest.php b/tests/CLI/TaskTest.php
index ec15613..ff34454 100755
--- a/tests/CLI/TaskTest.php
+++ b/tests/CLI/TaskTest.php
@@ -9,7 +9,7 @@
 class TaskTest extends TestCase
 {
     /**
-     * @var Task
+     * @var ?Task
      */
     protected $task;